{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["city of headquarters", "employee of", "country of headquarters", "origin"], "input": "Alfredo Castillero Hoyos graduated at the  University of Warwick   England  where he obtained a Masters ' Degree in Political Studies in 1993 ."}
{"city of headquarters": [], "employee of": [], "country of headquarters": [{"subject": "University of Warwick", "object": "England"}], "origin": []}